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2 items are filed under this topic.
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Cardinality of sets |
2001-11-19 |
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From Tania:
- Show that the cardinality of P(X) (the power set of X) is equal to the cardinality of the set of all functions from X into {0,1}.
- Show that (the cardinality of the natural numbers set) |N| = |NxNxN|.
- Show that the cardinality of the set of prime numbers is the same as the cardinality of N+
Answered by Walter Whiteley. |
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Diagonals in a polygon |
1996-06-18 |
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From Steven:
How many diagonals are there in a polygon?
Answered by Denis Hanson. |
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